The leaders of Russia, France and Germany underscored the need to preserve the 2015 nuclear deal with Iran, stressing their commitment to boosting trade ties with the Islamic Republic despite the United States’ unilateral withdrawal from the accord.

Iran has dismissed a Reuters report claiming that the country has demanded a guaranteed sale of at least 1.5 million barrels per day (bpd) of crude as a prerequisite for staying in a multilateral nuclear deal it clinched with world powers in 2015.

EU Foreign Policy chief Federica Mogherini and foreign ministers of France, Germany and the UK issued a joint statement on Thursday expressing full support for Iran's nuclear deal, also known as Joint Comprehensive Plan of Action (JCPOA).

Almost two dozen European security experts have called on the United States to return to the 2015 nuclear deal with Iran in the wake of Tehran’s suspension of some of its commitments under the accord in reciprocation for Washington's withdrawal last year.

United Nations Secretary-General Antonio Guterres has described the 2015 Iran nuclear deal as a major diplomatic achievement, expressing hope that the international document could be saved following the US’s withdrawal.